centos下使用rpm方式安装python

不小心将centos下的原装python2删除了，然后yum方式没办法安装python。只能通过rpm方式安装。
打开：http://mirrors.163.com/centos/7/os/x86_64/Packages/
下载的包文件如下：
libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
lvm2-python-libs-2.02.185-2.el7.x86_64.rpm
python-2.7.5-86.el7.x86_64.rpm
python2-rpm-macros-3-32.el7.noarch.rpm
python-backports-1.0-8.el7.x86_64.rpm
python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm
python-chardet-2.2.1-3.el7.noarch.rpm
python-devel-2.7.5-86.el7.x86_64.rpm
python-iniparse-0.4-9.el7.noarch.rpm
python-ipaddress-1.0.16-2.el7.noarch.rpm
python-kitchen-1.1.1-5.el7.noarch.rpm
python-libs-2.7.5-86.el7.x86_64.rpm
python-pycurl-7.19.0-19.el7.x86_64.rpm
python-rpm-macros-3-32.el7.noarch.rpm
python-setuptools-0.9.8-7.el7.noarch.rpm
python-srpm-macros-3-32.el7.noarch.rpm
python-urlgrabber-3.10-9.el7.noarch.rpm
python-virtualenv-15.1.0-2.el7.noarch.rpm
rpm-4.11.3-40.el7.x86_64.rpm
rpm-build-4.11.3-40.el7.x86_64.rpm
rpm-build-libs-4.11.3-40.el7.x86_64.rpm
rpm-libs-4.11.3-40.el7.x86_64.rpm
rpm-python-4.11.3-40.el7.x86_64.rpm
rpm-sign-4.11.3-40.el7.x86_64.rpm
yum-3.4.3-163.el7.centos.noarch.rpm
yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
yum-plugin-aliases-1.1.31-52.el7.noarch.rpm
yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
yum-plugin-protectbase-1.1.31-52.el7.noarch.rpm
yum-utils-1.1.31-52.el7.noarch.rpm

有的包名字可能会更新，那么，就去找相似的去替代吧。
然后执行
rpm -Uvh --replacepkgs python*.rpm
搞定！

等等，python2是安装好了，然后安装python3使用make install时又出现了什么type模块找不到的问题，需要安装libffi-devel-3.0.13-18.el7.x86_64.rpm。然后ok